| 摘要 |
PURPOSE:To obtain a large speed reduction ratio in a small-sized and light speed reduction clutch by loosely fitting a pin in a pin insertion hole disposed on a planetary gear, fixing one end of the pin to a sliding plate of a clutch, and transmitting rotation of the planetary gear to an output shaft of the clutch through the pin and the sliding plate. CONSTITUTION:A speed reduction gear 1 is a cycloid speed reduction gear is which planetary gears 4a, 4b are rotatably inscribed in a pin-like sun gear 3 planed in a sun gear plate 2. The number of teeth of the planetary gears 4a, 4b is smaller than that of the sun gear 3, and a plurality of pin insertion holes 5 are radially and axially bored in the planetary gears 4a, 4b. The end portion of a pin 6 loosely fitted in the pin insertion hole 5 is fixed to a sliding plate 30 of a clutch. Accordingly, when an input shaft 29 rotates, the planetary gears 4a, 4b rotate round the sun gear and on their axes at the rotational frequency for a difference in number of teeth between the planetary gears and the sun gear. The rotation is taken out by the pin 6, so that the sliding plate 30 is decreased in speed and rotated. |
